Yaeno Muteki
Yaeno Muteki is a character from the multimedia franchise Umamusume Pretty Derby and a featured cast member in the spin-off manga Umamusume Cinderella Gray. Attending Tracen Academy's Senior High division and residing in the Ritto Dormitory, she is a dedicated martial artist practicing the Kongo Yaegaki-ryu style passed down by her grandfather. Channeling her school's non-violent combat philosophy into her running, she refines her skills through competitive racing. Driven by a deep sense of discipline, manners, and pride in her heritage, she strives to bring honor to her family's martial tradition on the turf.
Overview
Yaeno Muteki is a character from the multimedia franchise Umamusume Pretty Derby and a featured cast member in the spin-off manga Umamusume Cinderella Gray. Attending Tracen Academy's Senior High division and residing in the Ritto Dormitory, she is a dedicated martial artist practicing the Kongo Yaegaki-ryu style passed down by her grandfather. Channeling her school's non-violent combat philosophy into her running, she refines her skills through competitive racing. Driven by a deep sense of discipline, manners, and pride in her heritage, she strives to bring honor to her family's martial tradition on the turf.
Appearance
Yaeno Muteki features short chestnut wolf-cut hair with a broad white streak down her bangs and ears tipped with white triangular patterns. She has upturned eyes framed by long upper eyelashes, and a red pinwheel hair accessory is fastened near her right ear. Her main race attire, Attack of the Four White Meteors, is a traditional Japanese martial arts costume in white, red, yellow, and blue, featuring a sash inscribed with a message from her grandfather. She also wears functional athletic casual wear, a cyber-samurai outfit named Black General Zen equipped with a green katana, and a bright orange ritual garment for traditional ceremonies. Her shoe size is 24.0 cm on both feet.
Personality
On the surface, Yaeno Muteki is a polite, stoic, and highly disciplined martial artist who places great importance on etiquette. However, she harbors an intense competitive drive and a hot-blooded nature beneath her composed exterior. Having been a unruly child before being guided into martial arts by her grandfather, she secretly struggles with low self-esteem regarding her past temperament. Despite her severe demeanor, she is exceptionally soft-hearted and easily flustered; she turns tearful over emotional animal movie trailers and her handwriting becomes childish when agitated. She also has an intense weakness for cute things, small animals, and plushies, which instantly spark her protective instincts.
Abilities
Yaeno Muteki applies the core principles of the Kongo Yaegaki-ryu style to her running, demonstrating sharp responsiveness and strong tactical awareness. Rather than relying purely on overwhelming power, she uses an exceptional natural intuition to read the movements and subtle cues of opposing runners, allowing her to react instantly on the track. Her tail possesses enough physical strength to swat away flying objects mid-air. Her rigorous discipline extends to her physical conditioning, maintaining high balance through daily chores, precise sewing skills, and specialized core exercises.
Background
Raised under the guidance of her grandfather, Yaeno Muteki took up the Kongo Yaegaki-ryu martial art to master self-control and channel her raw energy positively. Upon enrolling in Tracen Academy, she entered the competitive Classic generation, taking part in key races such as the Mainichi Hai and the Satsuki Sho. Facing fierce opposition and difficult losses against the top runners of her era, she uses every setback as motivation to hone her mind and body, aiming to spread the prestige of her family's martial tradition.
Relationships
Yaeno Muteki maintains close friendships and intense rivalries with her classmates Sakura Chiyono O and Mejiro Ardan. At the dormitories, she shares a room with No Reason, enjoying frequent games of shogi with her despite occasionally being bewildered by her roommate's unpredictable personality. She also forms a strong bond with Bamboo Memory, with whom she routinely spars in kendo matches. Additionally, she harbors a deep drive to prove herself against top-tier competitors like Oguri Cap.
Trivia
Her real-world namesake was a successful Japanese racehorse that won the Satsuki Sho in 1988 and the Tenno Sho (Autumn) in 1990. Her smartphone wallpaper features a photo of double-flowered camellias she viewed with her grandparents. Her personal habits include choosing only plain white socks for herself, while she struggles with prolonged formal kneeling (seiza) and eating street food on the go.
